EAA/ANN AirVenture Innovation Preview

AD NUMBER: 2006-05-11
MANUFACTURER: Bombardier
SUBJECT: Airworthiness Directive 2006-05-11SUMMARY: The FAA is
superseding an existing airworthiness directive (AD) that applies
to certain Bombardier Model CL-600-2B19 (Regional Jet Series 100
& 440) airplanes. The existing AD currently requires revising
the airworthiness limitations section of the Instructions for
Continued Airworthiness of the aircraft maintenance manual (AMM) by
incorporating procedures for repetitive functional tests of the
pilot input lever of the pitch feel simulator (PFS) units. This AD
requires new repetitive functional tests of the pilot input lever
of the PFS unit, and corrective actions if necessary. After
initiating the new tests, this AD also requires removal of the
existing procedures for the repetitive functional tests from the
AMM. This AD results from a report that the shear pin located in
the input lever of two PFS units failed due to fatigue. We are
issuing this AD to prevent undetected failure of the shear pin of
both PFS units simultaneously, which could result in loss of pitch
feel forces and consequent reduced control of the airplane.